Slim a wide-set jaw and take the pressure out of clenching and grinding, without changing your smile or your expressions.
“I came for the jaw slimming and the thing I actually noticed first was that I stopped waking up with a sore jaw.”
The masseter is the chewing muscle at the angle of the jaw. When it is overdeveloped it widens the lower face, and it is usually doing the clenching too.
The masseter sits on each side of the jaw and does the work of chewing. In some people it is naturally large, and in many others it enlarges over time through habitual clenching or grinding, often at night and often without the person realising it is happening at all.
An overdeveloped masseter squares off the lower face, widening the jaw when viewed from the front and blunting the transition from jawline to neck. Treating it relaxes the muscle so that it gradually reduces in bulk, slimming and softening the lower third of the face.
The second effect is the one patients frequently value more. Because the treated muscle cannot clench with the same force, the tension headaches, jaw ache and tooth wear that come with grinding often ease considerably. For many people the aesthetic change and the symptom relief arrive together.
Masseter treatment makes a wide jaw narrower. Jaw filler makes an undefined jaw sharper. They pull in opposite directions, and choosing the wrong one is the most common mistake we correct.
Assessment matters more here than in almost any other treatment we offer. If your jawline needs structure rather than slimming, we will say so, and treating the masseter would make the concern worse rather than better.
Book nowWe assess the size and activity of the masseter on both sides, ask about clenching, grinding and jaw pain, and check whether slimming is genuinely what your face needs. Asymmetry between the two sides is common and is planned for at this stage.
Numbing cream is applied first. The injectable is placed into the masseter muscle on each side of the jaw using a fine needle. The appointment takes around 10 minutes.
There is no downtime and you can return to normal activities immediately. Initial changes appear within about a week, with the full slimming effect visible by around six weeks. Results typically last up to six months.
Masseter treatment suits you if the lower third of your face reads as wide or square, or if you clench and grind and are feeling the consequences.
If your jawline lacks definition rather than needing slimming, masseter treatment is the wrong answer and we will tell you so at consultation.
Final pricing is confirmed at your consultation, based on the amount of product that genuinely suits you. No obligation to proceed.
Every treatment is carried out in our Save Face accredited clinic on New Cavendish Street, five minutes from Oxford Street, by a medically qualified team.
A muscle-relaxing injectable is placed into the masseter muscle on either side of the jaw to slim and contour the lower face. It takes approximately 10 minutes to perform, and the results develop over the following weeks.
Most patients experience very little discomfort. Numbing cream is applied beforehand to keep you comfortable. Patients typically describe the sensation as mild to none.
There is no downtime. You can return to your normal daily activities immediately after treatment.
Initial changes can start to appear within a week, with the full slimming and contouring effect visible by around six weeks after treatment. This is a gradual treatment rather than an immediate one.
Results typically last up to six months, after which a maintenance treatment may be recommended to sustain the effect.
Yes, when performed by an experienced practitioner. The technique has been used for many years for muscle relaxation and jawline contouring, and at Dermamina it is always carried out by a qualified clinician and independent prescriber.
No. Performed correctly, the treatment targets only the masseter muscle. It slims the jawline without affecting your smile or your natural facial expressions.
Yes. Relaxing the masseter reduces the force of clenching and grinding, which is often what caused the muscle to enlarge in the first place. Many patients find their jaw tension and associated headaches ease as a result.
They do opposite jobs. Masseter treatment narrows a jaw that is too wide. Jaw filler adds structure to a jaw that lacks definition. Which one is right depends entirely on your assessment, and choosing wrongly makes the original concern worse.
We are trusted for natural-looking, bespoke treatments tailored to the individual. We prioritise your suitability and comfort, and we will decline to treat if the assessment says this is not the right answer for your face.
Book a consultation and get an honest, expert opinion. No pressure, no obligation, and open seven days a week.
